122 ILLINOIS STATE DAIRYMEN'S ASSOCIATION 



2. Eradication of tuberculosis from circumscribed 

 areas. 



3. Eradication of tuberculosis from swine. 



It is important to eradicate tuberculosis from pure-bred 

 herds of cattle at the earliest possible date because the 

 spread of the disease is greater among such animals than 

 among grade cattle. The reason is plain; pure-bred ani- 

 mals are shipped extensively to every part of the United 

 States for breeding purposes. A pure-bred bull or cow may 

 be shipped from Main to Texas, or from the State of Wash- 

 ington to Florida. If it is diseased and is introduced into a 

 healthy herd, it not only fails to fulfill the purpose for 

 which it was intended — the upbreeding of the herd — but it 

 actually causes heavy damage by spreading the disease to 

 healthy animals. 



Accredited-Herd or Honor-Roll Plan. 



The breeders of pure-bred registered cattle full appre- 

 ciated the above-mentioned fact when, together with the 

 live-stock sanitary officials of practically all the States, 

 they adopted what is known as the accredited-herd plan, 

 the principles of which are that herds found to be free from 

 tuberculosis on two successive annual tests are placed on the 

 Honor Roll, and a certificate is given to the owner by the 

 State and the Federal Government. The certificate entitles 

 animals of that herd to be shipped interstate without fur- 

 ther tuberculin testing for a period of one year. This plan 

 is becoming well known to breeders through the United 

 States. 



The methods of eradicating tuberculosis from grade 

 herds are, of course, the same as for pure breds. No owner 

 can rest assured that his herd is free from tuberculosis un- 

 less it has been properly tuberculin tested. To make a sat- 

 isfactory test all the cattle should be in normal condition 

 and, so far as practicble, the cattle should be stabled under 

 usual conditions and among usual surroundings. Feeding 

 and watering should be conducted in the customary manner, 

 with the exception that feed and water should be given 

 only after the temperature has been taken. Careful phys- 



